Proper etiquette question for the masters of the lounge.

My roommate and I are going to our local B&M tomorrow night after work to just chill and smoke for a bit. My question is: when going to a cigar lounge to relax is it customary to bring your own cigars or only buy from the store and smoke what is available there?

Reason I am asking is because I have bought and been given cigars from various places besides the ones I have bought from there and did not want to offend the store owners. Any help is appreciated!

Edit: Looks like we are each going to take one with us and buy one there as well. Thanks for the help!